The Land Before Time X: The Great Longneck Migration is a 2003 animated film and the tenth film in the Land Before Time series. Littlefoot has nightmares which involves the "Great Circle". He mentions it to his grandparents, who share the experience. Grandpa has a feeling that he wants to "go somewhere", and they leave the next day with no help but sense to tell them where they were going. Out of curiosity, the others follow him, starting after them the following night. New characters are introduced throughout the film: Sue, a Supersaurus, who is driven on by the same sense as Grandpa, joins... Littlefoot, and they met Pat, an elderly Apatosaurus. Sue is always haunted by a want to meet someone taller than her, as she towers above everyone else. Pat is slow-moving, but does arrive at the crater in time for the event. He injures his foot due to volcano activity. However, another surprise is in store, as Littlefoot meets his father, Bron , for the first time in his whole life. However, Bron isn't alone.
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| Release date: | December 2, 2003 |
| Directed by: | Charles Grosvenor |
| Rated: |  |
| Runtime: | 84 Minutes |
| Producer: | Charles Grosvenor |
| Music by: | Michael Tavera, Jerry Goldsmith |
| Screenplay by: | Judy Freudberg, Tony Geiss |
| Genre: | Animation, Adventure |